package filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

/**
 * Handle all requests and responses as UTF-8 encoded
 **/
public class CharsetFilter implements Filter {
	private String encoding;

	@Override
	public void init(FilterConfig config) throws ServletException {
		encoding = config.getInitParameter("requestEncoding");
		if (encoding == null) {
			encoding = "UTF-8";
		}
	}

	// Set request and response encoding to UTF-8
	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain next) throws IOException, ServletException {
		if (request.getCharacterEncoding() == null) {
			request.setCharacterEncoding(encoding);
		}
		response.setCharacterEncoding("UTF-8");
		next.doFilter(request, response);
	}

	@Override
	public void destroy() {
	}

}
